MCP3201_07 Datasheet, PDF (9/28 Pages) Microchip Technology – 2.7V 12-Bit A/D Converter with SPI Serial Interface

MCP3201
Note: Unless otherwise indicated, V_DD = V_REF = 5V, V_SS = 0V, f_SAMPLE = 100 ksps, f_CLK = 16*f_SAMPLE,T_A = 25°C
12.00
11.75
11.50
11.25
11.00
10.75
10.50
10.25
10.00
V_DD = V_REF = 2.7V
F_SAMPLE = 50 ksps
V_DD = V_REF = 5V
F_SAMPLE =100 ksps
9.75
9.50
9.25
9.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V_REF (V)
FIGURE 2-25: Effective Number of Bits (ENOB) vs.
V_REF.
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
1
V_DD = 5V
F_SAMPLE = 100 ksps
V_DD = 2.7V
F_SAMPLE = 50 ksps
10
100
Input Frequency (kHz)
FIGURE 2-28: Effective Number of Bits (ENOB) vs.
Input Frequency.
100
90
80
70
60
50
40
30
20
10
0
1
V_DD = V_REF = 5V, F_SAMPLE = 100 ksps
V_DD = V_REF = 2.7V
FSAMPLE = 50 ksps
10
100
Input Frequency (kHz)
FIGURE 2-26: Spurious Free Dynamic Range
(SFDR) vs. Input Frequency.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
0
V_DD = V_REF = 5V
F_SAMPLE = 100 ksps
FINPUT = 9.985kHz
4096 points
10000 20000 30000 40000
Frequency (Hz)
50000
FIGURE 2-27: Frequency Spectrum of 10 kHz input
(Representative Part).
0
-10
-20
-30
-40
-50
-60
-70
-80
1
10
100
1000
Ripple Frequency (kHz)
10000
FIGURE 2-29: Power Supply Rejection (PSR) vs.
Ripple Frequency.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
0
V_DD = V_REF = 2.7V
FSAMPLE = 50 ksps
F_INPUT = 998.76 Hz
4096 points
5000
10000 15000 20000
Frequency (Hz)
25000
FIGURE 2-30: Frequency Spectrum of 1 kHz input
(Representative Part, V_DD = 2.7V).
© 2007 Microchip Technology Inc.
DS21290D-page 9